Dispensing valves for liquid containers with pin connected stem bushing



Jan 1970 ,B ETAL 3,488,035

DISPENSING VES FOR LI D CONTAINERS WITH PIN CONNECTED ST BUSHING Filed Feb. 16, 1968 JA/VE/VTOR 9- United States Patent US. Cl. 251323 3 Claims ABSTRACT OF THE DISCLOSURE An improvement in a dispensing valve for a liquid container wherein the valve mechanism is removably contained in the valve body in a manner such that the valve mechanism may be bodily removed and the parts thereof separately cleaned or rep aired when required.

SUMMARY OF THE INVENTION Our invention is an advancement over the prior art by the provision of a simple bushing through which the valve stem reciprocates and which serves to retain a spring in abutment with the valve piston to yieldably hold the latter in closed position with respect to the outlet port or nipple of the valve, the bushing being removably held in place at one end of the valve chamber by a substantially U-shaped pin, the opposite limbs of which project into an annular groove formed in the bushing; by removing the pin the entire valve mechanism may be bodily removed and the parts separately cleaned and repaired when required.

The invention relates to Class 251.

The preferred form of construction of our invention is shown in the accompanying drawings wherein:

FIG. 1 is a fragmentary view of a container with our invention associated therewith;

FIG. 2 is a longitudinal sectional detail view taken substantially on line 2-2 of FIG. 1; and

FIG. 3 is a perspective view of a bushing and its retainer pin embodied in the invention.

In the drawings, we have illustrated a fragmentary portion of a tank or container with which our invention may be associated. This container may be a liquid container or a container for any other flowable material.

Our invention includes a valve body 11 which may be of any desirable shape having a surface 12 which is machined or lapped so as to have substantially flat contact with the adjacent wall 13 to which it is attached by means of screws 14 threaded into the wall 13 through holes 15 formed in opposite flanges 16 provided by the valve body 11.

The valve body'11 has a longitudinally extending bore 17 formed therethrough. At the lower end 18 of the bore 17 there is inserted one end of a nipple 19 through which the contents of the container are discharged when the valve is in open position.

The inner end of the nipple 19 provides a valve seat 20 for a sealing washer 21 carried by a piston 22, which piston when in the position shown in FIG. 2, closes passage through the discharge port 23 formed in the container in alignment with the port 23 of the valve body 11. An O-ring 24 provides a seal between the wall of the container 10 and the valve body 1 1 at the point of juncture between the ports 23 and 23'.

The piston 22 by means of a pin 25, is connected to one end of a piston rod 26 extending coaxially with respect to the piston 22 and reciprooates through a bushing 27 inserted in the upper end portion of the bore 17. The bushing 27 has an annular groove 27' formed in its cylindrical wall into which is rcmovably projected the end portions of oppositely disposed limbs 28 of a sub- Patented Jan. 6, 1970 stantially U-shaped pin 29. The limbs 28 of such pin are projected into the groove 27' through spaced openings 30 formed in the valve body as shown in FIGS. 1 and 2.

The bushing is fitted into the base 17 in a manner such that it may be easily removed when the pin 29 has its limbs 28 withdrawn from position in the groove 27. Upon such withdrawal, the bushing 27 and the entire valve mechanism assembly may be easily removed.

Disposed between the bushing 27 and the piston 22 is an expansion spring 31 functioning to yieldably hold the piston seal 21 against its seat 20, with the piston 22 blocking passage through the ports 23 and 23'. By pulling the piston rod 26 upwardly, the piston 22 can be moved to\ position to open the ports 23 and 23', to allow discharge of the contents of the container 10.

As seen in FIG. 2, spaced O-rings 32 provide resilient seal between the piston 22 and the valve body 11.

The simplicity and utility of our invention will be obvious from the foregoing description. By the simple operation of engaging a suitable tool, such as a screw driver, pliers or the like, with the bight portion of the pin 29, the pin 29 may be easily and quickly removed and the valve mechanism may then be bodily removed by grasping the piston rod 26 and exerting an upward pull thereon to withdraw the valve mechanism from the body 11.

Having thus described our invention, what we claim as new and desire to protect by Letters Patent is:

1. A container valve comprising:

(a) a valve body having a longitudinally extending bore therein and :a port in a wall thereof for the admission of liquid into the body,

(b) valve mechanism for closing said port,

(c) said mechanism including an outlet nipple at one end of the bore and providing a valve seat,

((1) a piston movable longitudinally within said bore and normally closing said port and having a sealing washer engaging said seat when said piston is in port closing position,

(e) a bushing inset in the opposite end of the bore and having a circumferentially extending groove formed therein between the opposite ends of the bushing.

(f) a piston rod connected to said piston and extending through said bushing,

(g) a spring embracing said rod between said bushing and said piston to yieldably hold the piston in port closing position,

(h) said valve body having spaced openings formed therein in communication with said groove on opposite sides of said bushing,

(i) and removable pin means extending into said groove on opposite sides of said bushing to removably retain said bushing in the said opposite end of said bore.

2. The container valve defined in claim 1 wherein the pin means is substantially U-shaped providing limb portions which extend through said openings into said groove on said opposite sides of said bushing to removably connect said bushing to said valve body.

3. The container valve defined in claim 2 wherein the bight portion of said U-shaped pin serves as a means to be engaged by a tool for removing the pin to permit re moval of said valve mechanism.

References Cited UNITED STATES PATENTS ARNOLD ROSENTHAL, Primary Examiner 

